java rsa内容超长_RSA 非对称加密解密，超长字符串分块处理
class RsaServer
{
/**
* @var false|resource
*/
protected $key;
/**
* 分隔符
* @var string
*/
protected $mark = '.';
/**
* 分片長度
* @var int
*/
protected $length = 245;
/**
* 獲取秘鑰
* RsaServer constructor.
* @param string $key_file
* @param bool $is_pub
* @throws FileNotFoundException
*/
public function __construct(string $key_file, $is_pub = false)
{
if (!is_file($key_file)) {
throw new \Exception('key path is invalid');
}
$content = file_get_contents($key_file);
if ($is_pub) {
$this->key = openssl_pkey_get_public($content);
} else {
$this->key = openssl_pkey_get_private($content);
}
return $this;
}
/**
* 私鑰加密
* @param string $data
* @return null|string
*/
public function privEncrypt($data = '')
{
$result = [];
if (!is_string($data)) {
return null;
} else if (strlen($data) > $this->length) {
foreach (str_split($data, $this->length) as $chunk) {
if (openssl_private_encrypt($chunk, $encrypted, $this->key)) {
$result[] = base64_encode($encrypted);
} else {
return null;
}
}
$result = implode($this->mark, $result);
} else {
$result = openssl_private_encrypt($data, $encrypted, $this->key) ? base64_encode($encrypted) : null;
}
return $result;
}
/**
* 公鑰加密
* @param string $data
* @return null|string
*/
public function publicEncrypt($data = '')
{
$result = [];
if (!is_string($data)) {
return null;
} else if (strlen($data) > $this->length) {
foreach (str_split($data, $this->length) as $chunk) {
if (openssl_public_encrypt($chunk, $encrypted, $this->key)) {
$result[] = base64_encode($encrypted);
} else {
return null;
}
}
$result = implode($this->mark, $result);
} else {
$result = openssl_public_encrypt($data, $encrypted, $this->key) ? base64_encode($encrypted) : null;
}
return $result;
}
/**
* 私鑰解密
* @param string $encrypted
* @return null
*/
public function privDecrypt($encrypted = '')
{
$result = '';
$encrypted_chunk = explode($this->mark, $encrypted);
if (!is_string($encrypted)) {
return null;
} else if (count($encrypted_chunk) > 1) {
foreach ($encrypted_chunk as $chunk) {
if (openssl_private_decrypt(base64_decode($chunk), $decrypted, $this->key)) {
$result .= $decrypted;
} else {
return null;
}
}
} else {
$result = openssl_private_decrypt(base64_decode($encrypted), $decrypted, $this->key) ? $decrypted : null;
}
return $result;
}
/**
* 公鑰解密
* @param string $encrypted
* @return null
*/
public function publicDecrypt($encrypted = '')
{
$result = '';
$encrypted_chunk = explode($this->mark, $encrypted);
if (!is_string($encrypted)) {
return null;
} else if (count($encrypted_chunk) > 1) {
foreach ($encrypted_chunk as $chunk) {
if (openssl_public_decrypt(base64_decode($chunk), $decrypted, $this->key)) {
$result .= $decrypted;
} else {
return null;
}
}
} else {
$result = openssl_public_decrypt(base64_decode($encrypted), $decrypted, $this->key) ? $decrypted : null;
}
return $result;
}
}
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